You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.

There are several possible causes for headaches.  According to a Chiropractor friend of mine, dehydration is a major cause.  For example, too many Margaritas one night can leave you seriously dehydrated, hung over and with a headache the next day.\nOther causes are stress, allergies, etc. Dr. Hoffman's reference below explains some of these in detail.
what is the cause for headaches